Tube-ejector device



April 14, 1953 s. BERGER 2,635,129

TuBE-EJETOR DEVICE Filed Aug. 1, 195o INVENTOR.

\ lo YSAMUEL BERGER UNITED STATES PATENT TUBE-EJECTOR DEVICE samuel Berger, Little silver, N. J. Application August 1, 1950, Serial No. 177,113

3 Claims.

(Granted under Title 35, U.A S. Code (1952),

, sec. 266) The invention described Vherein may be manufactured and used by or for the Government for governmental purposes, Without the payment of any royalty thereon.

This invention relates to improvements in tube sockets, and more particularly to means in the form of a tube-ejector device associated with a conventional tube and socket and operable to force an initial movement of the tube axially away from the socket whereby the terminal prongs of the tube are at least partially released from the grip of the socket. v

An example of a tube ejector to which this invention relates is shown in British Patent No. 445,486 issued April 14, 1936, to Reginald J. Miller. Reference is also made to the design for a tubeejector device, as disclosed in my copending application Serial Number 194,003, led November 3, 1950.

One of the objects of this invention is the provision of a tube socket of the characterreferred to which has advantages over those proposed heretofore in the Way of greater simplicity of construction and manner of operation, and lower cost of manufacture.

Another object of my invention is the provision of a tube-ejector device which can be readily combined to work with any conventional socket and the corresponding conventional tube.

Other objects and advantages will hereinafter appear.

For the purpose of illustrating this invention, an embodiment thereof is shown in the drawings, wherein Fig. 1 is a front elevational view, partly in section, of a conventional tube and socket with which there is associated a tube-ejector device constructed and operating in accordance with the invention;

Fig. 2 is a view similar toFig. 1 and illustrative of the manner of operation of the improved tubeejector device, the section being taken on the line 2-2 in Fig. 3; and

Fig. 3 is a plan view, partly broken away, of Fig. 1.

In the drawing, the reference numeral I designates a conventional tube socket of the so-called above-chassis type, and into which is plugged the tube II. Socket I0 consists of a base-plate Illa secured to the chassis I2 by studs Illb, and of a cylindrical part Ic extending upwardly through the usual circular open I2a in the chassis.

In the embodiment of the invention disclosed in the drawing, the improved tube-ejector device is shown as being in the form of a ring I4 disposed 2 rotatable with respect to the latter about the longitudinal axis thereof. The ring I4 is threaded `on the part Inc by steeply-pitched threads designated, respectively, by the reference numerals Id and Ma.

For the purpose of imparting rotary movement to rring I4 about the vertical or longitudinal axis of socket Iii, it is provided on its outer, cylindrical surface with teeth I4b. A pinion I5 is supported in mesh with ring I4, as shown. Upon rotation of pinion I5 clockwise, as viewed in Fig. 3, ring I4 rotates counter-clockwise, and by reason of the screw-jack principle or cam-like action provided by threads Ind and I4a, the ring forces itself upward, as shown in Fig. 2, to release the terminal prongs I Ib of the tube from the grip of the socket. For this purpose, the disposition and dimensions of ring I4 are such that it is flush-mounted with the socket I0, as shown, and engages the under surface of part of the tube structure above the socket. This part is the Bakelite base I Ia in the conventional type of tube shown to illustrate my invention. In the trade, this type base is designated as octal and is common to many tubes including the GSQ'IGT.

A plate I5a which ts about the cylindrical part IIIc of the socket and is disposed within the opening I2a, flush with the chassis, is secured in place against the base-plate Illa by the studs IIIb, as shown. A horizontally disposed lug I5b which may be integral with plate Ia, provides the means for mounting pinion I 5 and supporting the same in mesh with ring I4.

The pinion I5 may be provided with an extension to facilitate rotation thereof by hand, or it may be slotted or otherwise shaped to receive a screwdriver or other suitable tool.

With the pitch of threads I Ud and I4a made relatively steep, as shown in Figs. 1 and 2, a few turns of pinion I5 are suiicient to raise ring I4 to the position shown in Fig. 2, at which'position the tube II is released suiiciently from the grip of the socket so that it can then be lifted out easily.

While but one embodiment of this invention has been disclosed, it will be understood by those skilled in the art that various modifications, such as in the size, shape and arrangement of the parts, are possible without departing from the spirit of the invention or the scope of the claims.

What is claimed is:

1. In combination with a tube socket, a device for ejecting an electron tube from said socket comprising a first ring with helical grooves on the outer surface thereof concentric with and xed to about the Cylindl'ilal part IIIc of the socket. ,and 55 said socket, a second ring concentric about said rst ring, said second ring having helical threads on the inner surface thereof engaged With said helical grooves, and teeth about the outer surface thereof, said second ring including means for engaging a portion of said electron tube, a pinion in mesh with said second ring, and means supporting said pinion to allow rotation thereof and to maintain said pinion vinme'sh with said ring, 'said lastnamed means being xed with respect to said socket.

2. The combination set forth in claim 1, in which said means for engaging a portionlof said electron twbe comprises the end of said ring which abuts said tube when the latter is seated lin said socket.

3. In combination with a tube socket,.:.a device for ejecting an electron tube vfrom said socket comprising a rst ring concentric with and Xed to said socket, a second ring concentric about said first ring and rotatable with respect thereto, said first*` and second rings having complementary and 4engaging `threads Vto permit movementof said secondring axially' of said `rst ring, `said second SAIVIU'ELA BERGER.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 1,408,528 Lyhne Mar. 7, 1922 2,172,340 Mihalyi Sept. 5, 1939 2,499,937 Deiss et al. Dec. 6, 1949 FOREIGN PATENTS Number Country Date 145,486 Great Britain Apr. 14, 193i)` `620,385 'Great Britain Mar.'23, 1949 

